Base-Catalyzed and Solvent-Dependent Cascade Reaction in the Regioselective Synthesis of Novel Fused Polycycles
作者:Min Xia、Guo-Feng Xiang、Bin Wu、Yi-Feng Han
DOI:10.1002/adsc.200700581
日期:2008.4.7
A novel base-catalyzed cascade reaction induced by Knoevenegal condensation that can regioselectively generate cyanoflavanones and heavily fused polycycles with intensive fluorescence and high quantum yields is reported. The reaction is solvent-dependent, low-polarity solvents promote the formation of polycycles while high-polarity solvents favor the conversion to cyanoflavanones. A possible mechanism